[Intel-gfx] [PATCH v3 0/3] drm/i915/guc/slpc: Implement waitboost for SLPC

Vinay Belgaumkar
2021-11-02T01:26:47Z

Waitboost is a legacy feature implemented in the Host Turbo algorithm. This
patch set implements it for the SLPC path. A boost can happen when a request
is waiting for an unmet dependency. GT frequency gets temporarily bumped to
boost freq to allow the previous request to finish quickly. We achieve this
on SLPC by setting the min frequency, SLPC will set that as the requested
frequency.

The boost will occur through a worker thread that will be scheduled
when the required conditions are met.

Like before, boost frequency is configurable through sysfs, so we can
adjust it to any specific value as long as it is between [min, RP0].

v2: Add a worker thread to perform freq boost.
v3: Address comments (Ashutosh)

Cc: Ashutosh Dixit <ashutosh.dixit@intel.com>
Signed-off-by: Vinay Belgaumkar <vinay.belgaumkar@intel.com>

Vinay Belgaumkar (3):
drm/i915/guc/slpc: Define and initialize boost frequency
drm/i915/guc/slpc: Add waitboost functionality for SLPC
drm/i915/guc/slpc: Update boost sysfs hooks for SLPC

drivers/gpu/drm/i915/gt/intel_rps.c | 72 +++++++++
drivers/gpu/drm/i915/gt/intel_rps.h | 3 +
drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c | 151 +++++++++++++++---
drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.h | 3 +
.../gpu/drm/i915/gt/uc/intel_guc_slpc_types.h | 13 ++
drivers/gpu/drm/i915/i915_request.c | 2 +-
drivers/gpu/drm/i915/i915_sysfs.c | 19 +--
7 files changed, 223 insertions(+), 40 deletions(-)

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2.25.0